/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/NiagaraNode.h
Virtual function to allow for custom widgets in the input or output box
virtual void AddWidgetsToInputBox ( [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [SVerticalBox](API\Runtime\SlateCore\Widgets\SVerticalBox) > InputBox )